package com.alpsoft.spotcheck.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import android.app.AlertDialog;
import android.app.AlertDialog.Builder;
import android.app.Dialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.content.Intent;
import android.content.pm.PackageManager.NameNotFoundException;
import android.net.Uri;
import android.os.Environment;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;

import com.alpsot.lkspotcheck.R;

/**
 * 实现程序自动更新
 * @author Nasir
 *
 */
public class UpdateManager {

	/* 下载中 */
	private static final int DOWNLOAD = 1;
	/* 下载结束 */
	private static final int DOWNLOAD_FINISH = 2;
	/* 保存解析的XML信息 */
	// HashMap<String, String> mHashMap;
	/* 下载保存路径 */
	private String mSavePath;
	/* 记录进度条数量 */
	private int progress;
	/* 是否取消更新 */
	private boolean cancelUpdate = false;
	private Context mContext;
	/* 更新进度条 */
	private ProgressBar mProgress;
	private Dialog mDownloadDialog;

	JSONObject jsonObject;
	private String version = "";
	private String apkName = "";
	private String downUrl = "";
	// private String info = "";

	private Handler mHandler = new Handler() {
		@Override
		public void handleMessage(Message msg) {
			switch (msg.what) {
			// 正在下载
			case DOWNLOAD:
				// 设置进度条位置
				mProgress.setProgress(progress);
				break;
			case DOWNLOAD_FINISH:
				// 安装文件
				installApk();
				break;
			default:
				break;
			}
		};
	};

	public UpdateManager(Context context) {
		this.mContext = context;
	}

	/**
	 * 检测软件更新
	 */
	public void checkUpdateInfo() {
		if (!Utils.isConnectedNetwork(mContext)) {
			Toast.makeText(mContext, R.string.soft_off_line, Toast.LENGTH_LONG)
					.show();
		} else {
			String isUpdate = isUpdate();
			if ("true".equals(isUpdate)) {
				// 显示提示对话框
				showNoticeDialog();
			} else if ("false".equals(isUpdate)) {
				Toast.makeText(mContext, R.string.soft_update_no,
						Toast.LENGTH_LONG).show();
			} else {
				Toast.makeText(mContext, isUpdate, Toast.LENGTH_LONG).show();
			}
		}
	}

	/**
	 * 检查软件是否有更新版本
	 * 
	 * @return
	 */
	private String isUpdate() {
		// 获取当前软件版本
		int versionCode = getVersionCode(mContext);
		String jsonStr = "";
		URLConnection oConn = null;
		try {
			String reqUrl = GlobalVar.httpUrl + "appVersion/queryAppVersion";
			URL oUrl = new URL(reqUrl);
			oConn = oUrl.openConnection();
			oConn.setConnectTimeout(5000);

			if (oConn != null) {
				InputStream input = oConn.getInputStream();
				BufferedReader oIn = new BufferedReader(new InputStreamReader(
						input));
				if (null != oIn) {
					jsonStr = oIn.readLine();
					oIn.close();
				}
				try {
					JSONArray jsa = new JSONArray(jsonStr);

					for (int i = 0; i < jsa.length(); i++) {
						JSONObject obj = jsa.getJSONObject(i);
						apkName = obj.getString("appName");
						if (apkName.equals("spotCheck.apk")) {
							version = obj.getString("currentVersion");
							apkName = obj.getString("appName");
							downUrl = GlobalVar.httpUrl
									+ obj.getString("appPath");
							if (Integer.parseInt(version) > versionCode) {
								return "true";
							}
							break;
						}
					}
					// 使用gson解析数据
					// Type listType = new
					// TypeToken<LinkedList<Base_App_Version>>() {
					// }.getType();
					// Gson gson = new Gson();
					// LinkedList<Base_App_Version> bavs =
					// gson.fromJson(jsonStr,
					// listType);
					// for (Iterator iterator = bavs.iterator(); iterator
					// .hasNext();) {
					// Base_App_Version bav = (Base_App_Version) iterator
					// .next();
					// Log.w("dd", bav.getAppName());
					// Log.w("ss", bav.getAppPath());
					// }
				} catch (JSONException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
					return "升级信息处理失败，请联系系统管理员！";
				}
			}
		} catch (IOException e) {
			e.printStackTrace();
			return "检查版本信息失败，请确保网络通畅！";
		}

		return "false";
	}

	/**
	 * 获取软件版本号
	 * 
	 * @param context
	 * @return
	 */
	private int getVersionCode(Context context) {
		int versionCode = 0;
		try {
			// 获取软件版本号，对应AndroidManifest.xml下android:versionCode
			versionCode = context.getPackageManager().getPackageInfo(
					context.getPackageName(), 0).versionCode;
		} catch (NameNotFoundException e) {
			e.printStackTrace();
		}
		return versionCode;
	}

	/**
	 * 显示软件更新对话框
	 */
	private void showNoticeDialog() {
		// 构造对话框
		final AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle(R.string.soft_update_title);
		builder.setMessage(R.string.soft_update_info);
		// 更新
		builder.setPositiveButton(R.string.soft_update_updatebtn,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						// 显示下载对话框
						showDownloadDialog();
					}
				});
		builder.setNeutralButton("浏览器更新", new OnClickListener() {
			@Override
			public void onClick(DialogInterface dialog, int which) {
				dialog.dismiss();
				Intent intent = new Intent();
				intent.setAction("android.intent.action.VIEW");
				Log.w("url", downUrl);
				Uri content_url = Uri.parse(downUrl);
				intent.setData(content_url);
				builder.getContext().startActivity(intent);
				// 显示下载对话框
				// showDownloadDialog();
			}
		});
		// 稍后更新
		builder.setNegativeButton(R.string.soft_update_later,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
					}
				});
		Dialog noticeDialog = builder.create();
		noticeDialog.show();
	}

	private void iedownloadApk() {

	}

	/**
	 * 显示软件下载对话框
	 */
	private void showDownloadDialog() {
		// 构造软件下载对话框
		AlertDialog.Builder builder = new Builder(mContext);
		builder.setTitle(R.string.soft_updating);
		// 给下载对话框增加进度条
		final LayoutInflater inflater = LayoutInflater.from(mContext);
		View v = inflater.inflate(R.layout.util_upprogress, null);
		mProgress = (ProgressBar) v.findViewById(R.id.update_progress);
		builder.setView(v);
		// 取消更新
		builder.setNegativeButton(R.string.soft_update_cancel,
				new OnClickListener() {
					@Override
					public void onClick(DialogInterface dialog, int which) {
						dialog.dismiss();
						// 设置取消状态
						cancelUpdate = true;
					}
				});
		mDownloadDialog = builder.create();
		mDownloadDialog.show();
		downloadApk();
	}

	/**
	 * 下载apk
	 * 
	 * @param url
	 */
	private void downloadApk() {
		// 启动新线程下载软件
		new downloadApkThread().start();
	}

	/**
	 * 下载文件线程
	 * 
	 * @author c.zhao
	 * @date 2015-4-30
	 */
	private class downloadApkThread extends Thread {
		@Override
		public void run() {
			try {
				// 判断SD卡是否存在，并且是否具有读写权限
				if (Environment.getExternalStorageState().equals(
						Environment.MEDIA_MOUNTED)) {
					// 获得存储卡的路径
					String sdpath = Environment.getExternalStorageDirectory()
							+ "/";
					mSavePath = sdpath + "download";
					URL url = new URL(downUrl);
					// 创建连接
					HttpURLConnection conn = (HttpURLConnection) url
							.openConnection();
					conn.connect();
					// 获取文件大小
					int length = conn.getContentLength();
					// 创建输入流
					InputStream is = conn.getInputStream();

					File file = new File(mSavePath);
					// 判断文件目录是否存在
					if (!file.exists()) {
						file.mkdir();
					}
					File apkFile = new File(mSavePath, apkName);
					FileOutputStream fos = new FileOutputStream(apkFile);
					int count = 0;
					// 缓存
					byte buf[] = new byte[1024];
					// 写入到文件中
					do {
						int numread = is.read(buf);
						count += numread;
						// 计算进度条位置
						progress = (int) (((float) count / length) * 100);
						// 更新进度
						mHandler.sendEmptyMessage(DOWNLOAD);
						if (numread <= 0) {
							// 下载完成
							mHandler.sendEmptyMessage(DOWNLOAD_FINISH);
							break;
						}
						// 写入文件
						fos.write(buf, 0, numread);
					} while (!cancelUpdate);// 点击取消就停止下载.
					fos.close();
					is.close();
				}
			} catch (MalformedURLException e) {
				e.printStackTrace();
			} catch (IOException e) {
				e.printStackTrace();
			}
			// 取消下载对话框显示
			mDownloadDialog.dismiss();
		}
	};

	/**
	 * 安装apk
	 */
	private void installApk() {
		File apkfile = new File(mSavePath, apkName);
		if (!apkfile.exists()) {
			return;
		}
		Intent i = new Intent(Intent.ACTION_VIEW);
		i.setDataAndType(Uri.parse("file://" + apkfile.toString()),
				"application/vnd.android.package-archive");
		mContext.startActivity(i);
	}

}
